フルテキストURL 00-鹿田遺跡目次等.pdf 01-鹿田遺跡14 第1章.pdf 02-鹿田遺跡14 第2章.pdf 03-鹿田遺跡第3章.pdf 04-鹿田遺跡第4章.pdf 05-表7.pdf 06-鹿田遺跡第5章.pdf 07-鹿田遺跡-図版.pdf 08-鹿田遺跡報告抄録.pdf
著者 山本 悦世| 岩﨑 志保| 沖 陽子| 藁科 哲男|
出版物タイトル 岡山大学構内遺跡発掘調査報告
発行日 2020-03-25
36巻
言語 Japanese
論文のバージョン publisher
Pages 125p. 36図版
フルテキストURL 00-鹿田遺跡目次等.pdf 01-鹿田遺跡 第1章.pdf 02-鹿田遺跡 第2章.pdf 03-鹿田遺跡 第3章.pdf 04-鹿田遺跡 第4章.pdf 05-鹿田遺跡 第5章.pdf 06-鹿田遺跡遺構一覧表.pdf 07-鹿田遺跡-図版.pdf 08-鹿田遺跡報告抄録.pdf
著者 山口 雄治| 南 健太郎| 岩﨑 志保| 渡辺 正巳| 能城 修一| 沖 陽子| 江川 達也|
出版物タイトル 岡山大学構内遺跡発掘調査報告
発行日 2019-03-29
35巻
言語 Japanese
論文のバージョン publisher
Pages 89p. 20図版
フルテキストURL iseki34.pdf iseki34_image.pdf
著者 山口 雄治| 岩﨑 志保| 野崎 貴博| 高椋 浩史| 能城 修一| 沖 陽子| 江川 達也|
出版物タイトル 岡山大学資源植物科学研究所報告
発行日 2018-03-30
34巻
言語 Japanese
論文のバージョン publisher
Pages 105, 図版19
フルテキストURL iseki033.pdf iseki033_image.pdf
著者 南 健太郎| 野崎 貴博| 能城 修一| 江川 達也| 白石 純| 沖 陽子|
出版物タイトル 岡山大学構内遺跡発掘調査報告
発行日 2018-02-28
33巻
言語 Japanese
論文のバージョン publisher
Pages 97, 図版36
フルテキストURL iriseki_032.pdf iriseki_032_image.pdf
著者 山本 悦世| 南 健太郎| 岩崎 志保| 山口 雄治| 高椋 浩史| 能城 修一| 白石 純| 沖 陽子| 江川 達也| 大久保 雅子|
出版物タイトル 岡山大学構内遺跡発掘調査報告
発行日 2017-03-21
32巻
言語 Japanese
論文のバージョン publisher
Pages 249p. 47図版
JaLCDOI 10.18926/fest/54863
タイトル(別表記) Evaluation of drop in official air temperature record at Okayama caused by relocation of observation field of Okayama Local Meteorological Observatory - By comparison with records observed at surrounding points -
フルテキストURL fest_022_061_064.pdf
著者 三浦 健志| 上田 悠生| 守田 秀則| 近森 秀高| 黒川 正宏| 中嶋 佳貴| 沖 陽子|
抄録 Statistical change in official temperature records at Okayama City caused by relocation of meteorological observation field of Meteorological Agency was evaluated. The observation field of Okayama local meteorological observatory was moved to the Tsushima Campus of Okayama University from the downtown area of Okayama City in March, 2015. Comparison between the air temperature records measured at meteorological agency station and the records at Tanjo Pond in Tsushima Campus, showed 0.56 ℃ drop in annual average before and after relocation. Moreover, comparison between the records of Okayama local meteorological observatory and that at the surrounding meteorological observing 9 stations showed 0.55 ℃ drop in annual average. Those results suggest that the relocation dropped annual average of air temperature by about 0.6 ℃.
キーワード Okayama Local Meteorological Observatory relocation drop in air temperature
出版物タイトル 岡山大学環境理工学部研究報告
発行日 2017-03
22巻
1号
開始ページ 61
終了ページ 64
ISSN 2187-6940
言語 Japanese
論文のバージョン publisher
NAID 120005997444
著者 沖 陽子|
発行日 2012-02
出版物タイトル 環境制御
33巻
資料タイプ その他
著者 沖 陽子|
発行日 2010-12
出版物タイトル 環境制御
32巻
資料タイプ その他
JaLCDOI 10.18926/fest/12836
フルテキストURL 13_111_119.pdf
著者 Akhtar M.Shahbaz| 沖 陽子| 足立 忠司|
抄録 To acclimate under orthophosphate (Pi) starved environment, plant species and cultivars display an elegant myriad of Pi-adaptive and rescue responses via reprioritizing internal Pi use and maximizing external Pi acquisition by reprogramming metabolism and restructuring root system architecture.Exploitation of considerable genetic diversity both between and within crop species and harnessing of these genetic variations can lead us to develop smart plants with improved P-acquisition, growth and yield under P-deprivation. To elucidate the effect of P-stress on plant growth, and P-efficiency under Pstarvation, 14 diverse Brassica cultivars were grown hydroponically in a climatically controlled chamber using sufficient (200 and 400 μM) and stress (10 and 20 μM) P-levels using ammonium phosphate (NH4H2PO4) as a P source. Cultivars showed differential growth behaviour in terms of biomass accumulation (shoot and root dry matter partitioning), percent distribution of Pi-concentration ([P]) and P-contents in plant parts (roots and shoots), and P-efficiency ratio (% PER)(relative shoot growth) indicating considerable genetic diversity among the tested Brassica cultivars. PER and the proportional increases in shoot dry matter (SDM) accumulation (SDMmax/SDMmin) in response to the P levels assisted in categorizing the cultivars into efficient and inefficient utilizers of the absorbed P from an ambient environment. Cultivars were classified into efficient responsive (ER), efficient non-responsive (ENR), non-efficient responsive (NER) and non-efficient non-responsive (NENR) by plotting ordination plots between PER and SDMmax/SDMmin under P-stress environment. Differential PER values at stress P levels corresponds to high P levels suggest that P efficiency mechanisms can be different from one cultivar to another within a give plant species and cultivars exhibiting high PER values are better choice to thrive under P-starvation.
キーワード Brassica cultivars biomass and P-distribution P-contents P-efficiency ratio
出版物タイトル 岡山大学環境理工学部研究報告
発行日 2008-03
13巻
1号
開始ページ 111
終了ページ 119
ISSN 1341-9099
言語 English
論文のバージョン publisher
NAID 120002304774
JaLCDOI 10.18926/fest/11441
フルテキストURL 012_077_081.pdf
著者 Khan Md. H. R.| Mohiuddin M.| Rahman M.| Akhtar M. S.| 沖 陽子| 足立 忠司|
抄録 Studies on the existing non-symbiotic diazotrophic systems still are the most promising for better use of biological nitrogen fixation (BNF) in agriculture. The possibilities for the extension of nitrogen fixation to rice plants still speculative. The prospect of extension of N(2)-fixation to other plants was originally formulated to simulate the possibilities for the biological use of atmospheric nitrogen in order to overcome the ecological and economical problems of nitrogenous fertilizers. In view of this, the present study was conducted for the characterization and identification of N(2)-fixing bacterial strains at the maturity (110 days) stage in rhizosphere of rice (BR 10, Oryza sativa L.) grown in Brahmaputra Alluvium soil of Bangladesh. The soil is characterized as 'Inceptisol' order and 'Aquept' suborder. It was identified as 'Dhamrai series', had 'silt' texture, pH 6.0 and 6.8 C/N ratio. The present results of the microbial tests on the rice rhizosphere soil demonstrated that out of 401 isolates, only 94 were branded as nitrogen fixing organisms per gram of soil, which is about 23.4% of the total isolates. Based on the selection criteria, four individual strains were selected for identification. Biochemical tests were conducted for proper identification. They were identified as Closteridium spp., Klebsiella spp., Bacillus spp. and Azospirllum spp.
キーワード Azospirllum spp. Bacillus spp. BNF Closteridium spp. Diazotrophs Klebsiella spp. Oryza sativa L.
出版物タイトル 岡山大学環境理工学部研究報告
発行日 2007-03-15
12巻
1号
開始ページ 77
終了ページ 81
ISSN 1341-9099
言語 English
論文のバージョン publisher
NAID 120002313950
JaLCDOI 10.18926/fest/11454
フルテキストURL 012_107_117.pdf
著者 Akhtar M. Shahbaz| 沖 陽子| 足立 忠司| Khan Md. H. R.|
抄録 Acclimation to orthophosphate (Pi) deprivation via highly coordinated Pi-starvation induced (PSI) classical mechanisms such as copious quantities of H(+) and carboxylates (OAs) exudation, remodeling and modification of root architecture by increasing structural and functional plasticity, enhanced uptake rate and increased synthesis of Pi transporters would reduce or eliminate our current overreliance on expensive, polluting, and nonrenewable Pi-fertilizers. These complicated but elegant morphological, physiological, biochemical and molecular adjustments of Pi-starved plants provide an excellent example of how the unique flexibility of plant metabolism and energy transduction helps them to cope in a typically stressful environment. Pi-starved roots possess enhanced H(+)-ATPase and PEPCase which could result in increasing H(+) efflux and OAs exudations in the root vicinity. This would lead to the rhizosphere acidification, which thereby contribute to the solublization and assimilation of mineral Pi from environment. To visualize the dissolution of sparingly soluble Ca-phosphate and rhizospheric pH changes (in situ), genetically diverse Brassica cultivars were grown on agar media. Newly formed Ca-phosphate was suspended in agar containing other essential nutriens. With NH(4)(+) applied as the N source, the precipitate dissolved in the root vicinity and this was ascribed to acidification. No dissolution was occurred with No(3)(-)-nutrition. In order to observe the pH changes at the media-root interface (rhizosphere), an image analysis was carried out after embedding the roots in agar containing bromocresol purple as pH indicator. Efficient cultivar 'Brown Raya' showed greater decrease in pH than P-inefficient 'B.S.A' in the culture media. Hydroponically grown cultivars were compared with respect to P-utilization efficiency (PUE), P-stress factor (PSF), and Ca- and P-uptake at P-starvation. PUE, and Ca- and P-uptake correlated significantly (P<0.01) with biomass accumulation, indicating that higher P-uptake of efficient cultivars was because of their higher Ca-uptake, which in turn was related to their better P-acquisition and PUE. Remodelling of root architecture of efficient cultivars helped the cultivars to establish a better rooting system, which provided basis for tolerance under P-starvation.
キーワード Brassica Bromocresol purple H(+) -efflux Rhizospheirc pH changes and acidification PUE
出版物タイトル 岡山大学環境理工学部研究報告
発行日 2007-03-15
12巻
1号
開始ページ 107
終了ページ 117
ISSN 1341-9099
言語 English
論文のバージョン publisher
NAID 120002313432
JaLCDOI 10.18926/fest/11450
フルテキストURL 012_099_106.pdf
著者 Akhtar M. Shahbaz| 沖 陽子| 足立 忠司| Khan Md. H. R|
抄録 As a rule, ion uptake by plant cells and roots has features of saturation kinetics. This is in accordance with the assumption of control, as for example by the number of binding sites of ions (carriers, permeases), or the capacity of the proton efflux pumps, in the plasma membrane and tonoplast. Solute transport across membranes is carrier mediated transport. Protein macromolecules integrated into the membrane matrix seems to be the carriers. The carrier-mediated process is subject to kinetics assumig that the number of carriers (binding sites) in the membranes is limited. Kinetics of ion transport through a membrane is considered equivalent to relationship between an enzyme and its substrate. To obtain plants of different P status, two genetically diverse Brassica cultivars (P-tolerant 'Con-1' and P-sensitive 'Gold Rush') were grown for several weeks in nutrient solution culture media. P-uptake kinetics of the roots with intact plants in short-term experiments by monitoring P depletion in culture media revealed that P-tolerant 'Con-1' cultivar had favorable characteristics for P-uptake because of high I(max) or V(max) and low K(m) or 1/2 I(max) value than P-sensitive 'Gold Rush' cultivar. By plotting relative growth rate (RGR) and internal P-concentration (PNC) among P-tolerant (group I; Brown Raya, Con-1, Rainbow, Dunkled and Peela Raya) and P-sensitive (group II; Toria, Sultan Raya, B.S.A, Toria Selection and Gold Rush) cultivars revealed that group I cultivars showed large metabolic fraction and small structural fraction than group II cultivars which provided basis for P-stress tolerance.
キーワード Brassica Membrane binding sites Carrier-mediated transport I(max) or V(max), K(m) Pi-uptake rate RGR
出版物タイトル 岡山大学環境理工学部研究報告
発行日 2007-03-15
12巻
1号
開始ページ 99
終了ページ 106
ISSN 1341-9099
言語 English
論文のバージョン publisher
NAID 120002314027
JaLCDOI 10.18926/fest/11446
フルテキストURL 012_091_098.pdf
著者 Akhtar M. Shahbaz| 沖 陽子| 足立 忠司| Khan Md. H. R.|
抄録 The potential of a crop favorably respond to breeding/selection and bioengineering programs depends upon the nature and magnitude of genetic variability. For effective selection, information on nature and magnitude of variation in population, association of character with dry matter yield and among themselves and the extent of environmental influence on the expression of these characters are necessary. The estimates of genetic parameters help in understanding the role of various plant traits in establishing the growth behavior of cultivars under a given set of environmental conditions. Genetic analysis leads us to a clear understanding of different morphological, physiological and genetic characters and also the type and extent of their contribution to dry matter yield. Six Brassica cultivars were grown in a P-deficient sandy loam soil for 49 days after sowing. Significant variations were observed for all the characters in all the cultivars used in the experiment. All the characters showed high heritability coupled with high genetic advance. Heritability (h(2)) is an approximate measure of the expression of a character. The highest estimates of broad sense heritability (h(2)= 0.90) and relative expected genetic advance (85.72%) were noted for root dry matter (RDM), while the estimate of expected genetic advance at 10% selection intensity was quite high (ΔG = 85.30c㎡) for leaf area per plant. The estimates of coheritability were positive and relatively higher for rootshoot ratio (RSR) in combination with shoot dry matter (SDM) (coh(2) = 2.002) and phosphorus use efficiency (PUE) (coh(2) = 1.875), whereas coheritability estimates were negative between leaf area per plant and RSR (coh(2) = -0.2010) indicating lack of association between these traits. High heritability with high genetic advance was exhibited by all the studied plant traits of cultivars evidencing that the traits could be further improved through individual plant selection. The innate variations within the Brassica gene-pool impel to drive a concentrated effort to understand the basis of adaptability. Access to the relevant genetic traits and information will provide necessary tools to select the optimal combinations of alleles adapted to local and changing growing environments especially nutrient stress conditions such as phosphorus (P) starvation.
キーワード Brassica Coheritability Genetic advance Genetic variability P-starvation Selection intensity
出版物タイトル 岡山大学環境理工学部研究報告
発行日 2007-03-15
12巻
1号
開始ページ 91
終了ページ 98
ISSN 1341-9099
言語 English
論文のバージョン publisher
NAID 120002313657
JaLCDOI 10.18926/fest/11443
フルテキストURL 012_083_089.pdf
著者 Khan Md. H. R.| Rahman Md. K.| Rouf A. J. M. A.| Sattar G. S.| Akhtar M. S.| 沖 陽子| 足立 忠司|
抄録 The pH values in the profiles of unburnt (agricultural land) soils were found to increase as a function of soil depth and burning (400 to 1000℃) of the soils increased average pH by 8%. The average sand content of the burnt (soil around brick kilns) soil profiles was increased by 245%, while 39 and 36% decreased the silt and clay contents. Soil organic carbon (Corg) in the unburnt soils (0-20 cm) at different agro-ecological zones in the eastern region of Bangladesh ranged from 0.8 and 1.4%, whereas the content of microbial biomass carbon (Cmic) in the studied unburnt soils ranged between 5 and 7% of the total Corg, suggesting that the microbial biomass releasing considerable amounts of carbon in soil while burning of the soils drastically reduced this contribution to about 1%. The values of soil Cmic in the unburnt soils were approximately 2 to 6 times higher in the topsoils than the subsoils (20-60 cm). Variable rainfall, temperature and soil fertility had an overriding influence, which was reflected by the average minimum (276 μg g(-1)) and maximum (439) amounts of soil Cmic in Moulvibazar and Cox' Bazar sites. The Cmic decreased upon soil burning by 92% of its original average value (346 μg g(-1)) in the soil profile of up to 100 cm. Burning of topsoils strikingly increased the Corg/Cmic ratio by about 6 to 9 times, while reduced the C/N ratio by about 1.5 to 2.5 times. The average loss of Corg, available and total N due to burning of the soils were 66, 72 and 44% (increase over average content of unburnt soil: IOAC), respectively, which suggests that the burning of the soils offset the essential roles of soil microorganisms, reduced soil fertility and soil microbial contribution.
キーワード brick burning C/N ratio microbial biomass carbon soil organic carbon ratio of microbial biomass to organic carbon.
出版物タイトル 岡山大学環境理工学部研究報告
発行日 2007-03-15
12巻
1号
開始ページ 83
終了ページ 89
ISSN 1341-9099
言語 English
論文のバージョン publisher
NAID 120002313396
JaLCDOI 10.18926/fest/11509
タイトル(別表記) The Outline of Totaling Result of The Class Evaluation Questionnaire by Students in 2001
フルテキストURL 008_087_092.pdf
著者 沖 陽子|
抄録 The committee of academic affairs of the Faculty of Environmental Science and Technology in 2001 planned and carried out "the class evaluation questionnaire survey by students" with original one. The committee has announced the totaling result of this survey, especially concerning both of the class evaluation and the self-estimation of student by themselves, in this paper. It is expected that these contents become the aid of the class improvement in near future.
キーワード The class evaluation questionnaire students 2001 committee of academic affairs outline of totaling result
出版物タイトル 岡山大学環境理工学部研究報告
発行日 2003-03
8巻
1号
開始ページ 87
終了ページ 92
ISSN 1341-9099
言語 Japanese
論文のバージョン publisher
NAID 120002313803
JaLCDOI 10.18926/fest/11532
フルテキストURL 007_091_098.pdf
著者 Kamboh Maqsood Ahmed| 沖 陽子| 足立 忠司|
抄録 To evaluate hypoxic-salinity tolerance in wheat varieties, three Japanese varieties (Nourin-61, Chikugo Izumi and Shirasagi Komugi, relatively salt tolerant) and one Pakistani variety (Blue Silver, relatively salt sensitive) were grown under control, hypoxia, saline and hypoxic-saline conditions. The results suggested that relatively hypoxia and salt tolerant variety Nourin-61 was capable of producing the highest relative shoot yield under combined stress conditions. On the other hand, relatively sensitive variety to both hypoxia and salinity conditions, could not withstand harmful effects of combined stress. A more close correlation of plant growth characters between salinity and hypoxic-salinity than hypoxia and hypoxic-salinity indicated that varieties with higher salt tolerance would suffer less than varieties with higher hypoxia tolerance under combined stress conditions. And the balance of Na/K ratio in shoot tissues seems to be the major evaluation factor as the tolerant variety when salinity and hypoxia stress occur together.
キーワード hypoxia growth and ionic composition salinity salt tolerance wheat varieties
出版物タイトル 岡山大学環境理工学部研究報告
発行日 2002-03-22
7巻
1号
開始ページ 91
終了ページ 98
ISSN 1341-9099
言語 English
論文のバージョン publisher
NAID 120002313980
JaLCDOI 10.18926/fest/11534
フルテキストURL 007_099_106.pdf
著者 Kamboh Maqsood Ahmed| 沖 陽子| 足立 忠司|
抄録 A few wheat varieties including two Japanese wheat varieties were evaluated for their salt tolerance at seeding stage, their behavior to increasing salinity levels and role of Na exclusion capacity in salt tolerance mechanisms. The wheat varieties were grown in nutrient solution and subjected to 0 (control), 25,75 and 125 mM NaCl salinity levels for 7 days. Although the shoot growth was reduced while Na contents were increased progressively with increasing salinity in all varieties, the varieties were quite different in their response. Salt tolerant va rieties maintained less reduction in their root and shoot growth and better water relations in their shoots than salt sensitive varieties under saline conditions. The wheat varieties were quite different in their Na exclusion capacity. Poor growth in salt sensitive varieties might be due to higher accumulation of Na in their shoots resulting from low Na exclusion capacity of roots, higher Na transport to shoot and/or inferior compartmentation capability.
キーワード growth and mineral composition increasing salinity Na exclusion capacity salt tolerance wheat varieties
出版物タイトル 岡山大学環境理工学部研究報告
発行日 2002-03-22
7巻
1号
開始ページ 99
終了ページ 106
ISSN 1341-9099
言語 English
論文のバージョン publisher
NAID 120002313704
JaLCDOI 10.18926/fest/11535
フルテキストURL 006_067_079.pdf
著者 Kamboh Maqsood Ahmed| 沖 陽子| 足立 忠司|
抄録 The distribution on Ca, K, Na and Cl in root and leaves was studied in salt tolerant variety (Chikugo Izumi) and salt sensitive variety (PB-81) of wheat under saline conditions. The plants grown in 5% Hoagland's nutrient solution were subjected to 100 mM NaCl salinity for one week before observation with scanning electron microscope and analysis of selected samples with X-ray microanalyzer. Root growth was not affected in salt tolerant variety but reduced significantly in salt sensitive variety. Shoot growth was reduced in both varieties but much higher in salt sensitive variety. Salinity increased accumulation of Na and Cl in all root cells including vascular cells in salt sensitive variety. Salt tolerant variety not only reduced uptake of Na and Cl under saline conditions but also restricted their accumulation in cortex maintaining vascular cells relatively free of these ions. Salt sensitive variety failed to block transport of Na and Cl from root to leaves leading to much accumulation of these ions in leaves under salinity sterss.
キーワード Ion distribution salinity salt tolerance wheat varieties X-ray microanalysis
出版物タイトル 岡山大学環境理工学部研究報告
発行日 2001-02-28
6巻
1号
開始ページ 67
終了ページ 79
ISSN 1341-9099
言語 English
論文のバージョン publisher
NAID 120002313904
JaLCDOI 10.18926/fest/19737
フルテキストURL 004_131_145.pdf
著者 Kamboh Maqsood Ahmed| 沖 陽子| 足立 忠司| 成岡 市|
抄録 A pot experiment was conducted to study the relative performance of IR 6,KS 282 and IR 10198-66-2 rice varieties cultivated under salt-affected conditions at EC of 6.0,9.0 12.0 dS m(-1) in a sandy clay loam soil havig ECe of 1.6 dS m(-1) treated as control. Six seedlings of 39-day old transplaned to each pot having 12 kg soil. The fertilizer as nitrophos and potassium sulphate at the rate of 57.0, 25.0 and 50.0 mg N,P and K kg(-1) soil respectively was applied at the time of transplanting while zinc sulphate at the rate of 5 mg Zn kg(-1) soil and 43.0 mg N kg(-1) of soil as additional dose were applied 19 and 30 days after transplanting respectively. Normal plant protection measures like number of tillers, panicles, paddy grains, filled and unifilled grains, yield per plant and sterility were recorded and shoot and straw samples were analysed for sodium, potassium, calcium and chloride contents. It was observed that growth and yield of all the varieties were reduced significantly with increasing soil salinity. Na/K and Na/Ca rations in shoot and straw increased significantly with increasing soil salinity. It was also observed that higher values of Na/K and Na/Ca rations in shoots affected growth parameters while higher values of these rations in straw affected yield components and grain yield. However, IR 6 having relatively lower values of Na/K and Na/Ca rations proved to be the most salt-tolerant rice among the three varieties studied.
キーワード soil salinity growth and yield mineral compasition rice varieties
出版物タイトル 岡山大学環境理工学部研究報告
発行日 1999-02-26
4巻
1号
開始ページ 131
終了ページ 145
ISSN 1341-9099
言語 English
論文のバージョン publisher
NAID 120002309142
著者 沖 陽子| 宇津木 友|
発行日 1998-02
出版物タイトル 岡山大学農学部学術報告
87巻
1号
資料タイプ 紀要論文